Paper  bibtex   

@inproceedings{ yoon_learning_2006,
  title = {Learning Heuristic Functions from Relaxed Plans.},
  url = {http://www.aaai.org/Papers/ICAPS/2006/ICAPS06-017.pdf?q=relaxed},
  urldate = {2015-01-13},
  booktitle = {{ICAPS}},
  author = {Yoon, Sung Wook and Fern, Alan and Givan, Robert},
  year = {2006},
  pages = {162--171},
  note = {cited By 9}
}